09. Fish Tank

import java.util.Scanner;

public class FishFank {
    public static void main(String[] args) {

        Scanner scanner = new Scanner(System.in);
        int length = Integer.parseInt(scanner.nextLine());
        int width = Integer.parseInt(scanner.nextLine());
        int height = Integer.parseInt(scanner.nextLine());
        double percentage = Double.parseDouble(scanner.nextLine());

        double liters = length * width * height * (100 - percentage) / 100000;

        System.out.println(liters);
    }
}